The ornamental design for a hinge leaf, as shown and described.
FIG. 1 is a front elevational view of a hinge leaf showing my new design,
the mounting plate being shown in broken lines for illustrative purposes
only;
FIG. 2 is a side elevational view taken from the left of FIG. 1;
FIG. 3 is a top plan view thereof; and
FIG. 4 is a sectional view taken on line 4--4 of FIG. 1.